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Purpose: To assess associations between sedentary time (ST), physical activity (PA), and cardiovascular health in early childhood. Method: Cross-sectional study including 160 children (age 6.1 y [SD 0.5], 86 boys, 93 maternal body mass index ≥ 30 kg/m2, and 73 gestational diabetes) assessed for pulse wave velocity, echocardiography, ultra-high frequency 48–70 MHz vascular ultrasound, and accelerometery. Results: Boys had 385 (SD 53) minutes per day ST, 305 (SD 44) minutes per day light PA, and 81 (SD 22) minutes per day moderate to vigorous PA (MVPA). Girls had 415 (SD 50) minutes per day ST, 283 (SD 40) minutes per day light PA, and 66 (SD 19) minutes per day MVPA. In adjusted analyses, MVPA was inversely associated with resting heart rate (β = −6.6; 95% confidence interval, −12.5 to −0.7) and positively associated with left ventricular mass (β = 6.8; 1.4–12.3), radial intima-media thickness (β = 11.4; 5.4–17.5), brachial intima-media thickness (β = 8.0; 2.0–14.0), and femoral intima-media thickness (β = 1.3; 0.2–2.3). MVPA was inversely associated with body fat percentage (β = −3.4; −6.6 to −0.2), diastolic blood pressure (β = −0.05; −0.8 to −0.1), and femoral (β = −18.1; −32.4 to −0.8) and radial (β = −13.4; −24.0 to −2.9) circumferential wall stress in boys only. ST and pulse wave velocity showed no significant associations. Conclusions: In young at-risk children, MVPA is associated with cardiovascular remodeling, partly in a sex-dependant way, likely representing physiological adaptation, but ST shows no association with cardiovascular health in early childhood. [ABSTRACT FROM AUTHOR]

Background: Physical activity (PA) may benefit academic performance, but it is unclear what kind of classroom‐based PA is optimal for learning. Aim: We studied the effects of physically active maths lessons on children's maths performance and maths‐related effects, and whether gender and previous mathematical or motor skills modify these effects. Sample: A total of 22 volunteered teachers and their pupils with signed consent (N = 397, mean age: 9.3 years, 51% females) participated in a 5‐month, teacher‐led, multi‐arm, cluster‐randomized controlled trial. Methods: The intervention included a PAL group (20 min of physically active learning in each 45‐min lesson), a breaks group (two 5‐min PA breaks in each 45‐min lesson) and a control group (traditional teaching). Maths performance was assessed with a tailored curriculum‐based test. Maths‐related enjoyment, self‐perceptions and anxiety were measured with a self‐reported questionnaire. The individual‐level intervention effects were tested via covariate‐adjusted linear mixed‐effect models with school classes serving as random effects. Results: Changes in maths performance or self‐perceptions did not differ between the intervention groups. Maths anxiety in learning situations increased in the PAL group (effect.28, 95% CI =.01–.56); there was no change in the other groups. Subgroup analyses suggested that maths anxiety increased in the PAL group among children in the two lowest tertiles of motor skills. It decreased in the highest tertile. Enjoyment decreased in the breaks group among pupils in the lowest motor skill tertile. Conclusions: Physically active maths lessons did not affect maths performance or self‐perceptions but had divergent effects on maths anxiety and enjoyment, depending on motor skills. [ABSTRACT FROM AUTHOR]

In this study, we aimed at comparing Finnish primary school students' physical activity and sedentary time during outdoor-learning and traditional school days. Outdoor learning is defined as purposeful and planned learning experiences in the outdoors . The study population consisted 20 students in grades 1-6 at one primary school. Physical activity was measured objectively by hip-worn accelerometers. The amounts of physical activity and sedentary time were compared for the same students between five school days with outdoor learning and four traditional school days. The study's main findings show that, moving from traditional classroom teaching to an outdoor-learning environment decreases students' sedentary time and increases light- and moderate-intensity physical activity during the school day. No differences were observed in leisure-time physical activity on school days with or without outdoor learning. Thus, outdoor learning is an effective complement to traditional classroom teaching in promoting physically active children.

Background: The factors associated with preschool-aged children's physical activity (PA) remains unclear. The aim of this cross-sectional study was to examine how different factors were associated with preschool-aged children's objectively measured PA and sedentary time. Methods: The study population was 5-6-year-old children (n = 140) and their parents (n = 138) from the STEPS Study in Turku in Southwest Finland in 2013-2014. PA and sedentary time were measured objectively by accelerometers from children and parents and body mass index with Tanita scale. Other factors (siblings, day care, organized PA and parents' education) were collected with questionnaires. Linear models were conducted. Results: Child's PA was positively associated with mother's PA and day care attendance. Child's sedentary time was positively associated with mother's sedentary time. Father's PA and sedentary time were associated with respective variables in children, but only among fathers with high education. Conclusion: Parental role modelling is essential in developing child's physically active and less sedentary lifestyle.

Purpose: To investigate the validity and test–retest reliability of a single seven-level scale physical activity assessment question (SR-PA L7) and its three-level categorization (SR-PA C3). Methods: The associations of SR-PA L7 and C3 with accelerometer-measured leisure-time physical activity (ACC-LTPA) and with the results of four different physical performance tests (6-min walk [n = 733], knee extension [n = 695], vertical jump [n = 731], and grip force [n = 780]) were investigated among women aged 47–55 years participating in the Estrogenic Regulation of Muscle Apoptosis study (n = 795). The reliability was studied using Spearman correlations with 4-month test–retest period (n = 152). Results: SR-PA L7 and C3 had low correlations with ACC-LTPA (rs =.105–.337). SR-PA L7, SR-PA C3, and ACC-LTPA explained comparable but small amount of variance of the physical performance test results. The reliability analysis provided moderate agreement (rs =.707 and.622 for SR-PA L7 and C3, respectively). Conclusions: SR-PA L7 and C3 demonstrated limited validity and reasonable repeatability. [ABSTRACT FROM AUTHOR]

Background: This study investigated the associations of subjectively and objectively measured physical activity (PA) and sedentary behavior with academic achievement. We further examined whether aerobic fitness, obesity, and bedtime mediate these associations. Methods: This study included 970 children aged 9-15 years (52.3% girls) from 9 schools throughout Finland. Register-based academic achievement [grade point average (GPA)] as well as self-reported and accelerometer-measured PA/sedentary behavior were assessed during spring 2013. Aerobic fitness (assessed via amaximal shuttle run test), body composition (assessed via bioimpedance analysis), and self-reported bedtime were collected. Structural equation modeling was applied to examine the associations. Standardized regression coefficients are presented. Results: Self-reported PA had a direct positive [β = 0.084; 95% confidence interval (CI), 0.023 to 0.145] and an indirect positive association with GPA through higher aerobic fitness (β = 0.061; 95% CI, 0.033 to -0.087). Accelerometer-based PA was not associated with GPA. Self-reported screen time had an indirect negative association with GPA through later bedtime (β = -0.071; 95% CI, -0.096 to -0.035) and lower aerobic fitness (β = -0.039; 95% CI, -0.059 to 0.019). Nonscreen sedentary time had a direct positive (β = 0.193; 95% CI, 0.101 to -0.289) and an indirect negative association with GPA through lower aerobic fitness (β = -0.040; 95% CI, -0.063 to -0.016). Conclusions: Participating in PA, avoiding excessive screen time, and going to bed earlier may benefit academic achievement. [ABSTRACT FROM AUTHOR]

Background: Schools are in a unique position to ensure that all students meet the current physical activity (PA) recommendations. This study aimed to examine 1st to 3rd grade elementary students' accelerometer measured school day PA in the United States (U.S.) and Finland. Methods: The sample consisted of 200 students (107 girls, 93 boys; ages 6 to 8) and their school day PA was monitored with hip-worn ActiGraph GT3X+ accelerometers across a 5-day school week and the thresholds 100 and 2296 count per minute were used to separate sedentary time, light PA, and moderate-to-vigorous PA (MVPA). Results: On an average school day, students were engaged in MVPA for 20.0 min in the U.S. and 24.1 min in Finland. Students' school-day MVPA was 9 to 16 minutes higher during physical education (PE) days compared with non-PE days (U.S: 25.8 vs. 16.6 min/day; Finland: 36.3 vs. 20.1 min/day). Girls had less MVPA and more sedentary time compared with boys in both samples. Conclusion: This study highlights both the role of PE and other school day physical activities in meeting PA guidelines. Policy measures are needed to change the structure of the school day and enhance PA to ensure that students meet the PA recommendations. [ABSTRACT FROM AUTHOR]

Purpose: This study aimed to investigate the tracking and changes of steps per day in adults and their determinants over 13 yr. Methods: A total of 2195 subjects (1236 women) 30--45 yr of age were randomly recruited from the ongoing Cardiovascular Risk in Young Finns Study in 2007 and were followed up in 2020. Steps per day, including both total and aerobic steps per day, were monitored for seven consecutive days with a pedometer in 2007--2008 and 2011--2012 and with an accelerometer in 2018--2020. Tracking was analyzed using Spearman's correlation. Stability and changes of steps per day over time in both low-active and high-active groups (based on median values) were described by percentage agreements, kappa statistics, and logistic regression. Associations of sex, age, and body mass index with the initial number and changes in steps per day were analyzed using linear growth curve modeling. Results: Tracking correlations of total steps per day at 4-, 9-, and 13-yr intervals were 0.45--0.66, 0.33--0.70, and 0.29--0.60, while corresponding correlations for aerobic steps per day were 0.28--0.55, 0.23--0.52, and 0.08--0.55, respectively. Percentage agreements were higher than 54%, and kappa statistics ranged from slight to fair over time. Compared with the low-active group, the high-active group at baseline had a higher probability of being active later in adulthood. Female sex and higher age were associated directly with the initial number of steps per day and inversely with changes in the number of steps per day. Body mass index was inversely associated with the initial number of steps per day and changes in the number of total steps per day. Conclusion: The 13-yr tracking of steps per day in adulthood was found to be low to moderately high. Daily ambulatory activity is essential to maintaining an active lifestyle throughout adulthood. Changes in the amount of adult steps per day vary by sex, age, and BMI. [ABSTRACT FROM AUTHOR]

The decline in adolescents' physical fitness (PF) in recent decades has raised concerns about current population's possible future challenges with health and physical functional capacity. This study explored the associations between body composition, physical activity, maturation, and PF development in adolescents. Furthermore, PF development of adolescents with low initial PF was assessed. A 2‐year observational study was conducted between spring 2013 and 2015. Nine comprehensive schools and their 10‐ to 13‐year‐old students were invited to participate in the study (1778), and a total of 971 students (54.6%) agreed. Cardiorespiratory fitness (20‐meter shuttle run), muscular fitness (push‐ups), fundamental movement skills (5‐leaps test), body composition (bioelectrical impedance analysis), moderate‐to‐vigorous physical activity (accelerometer), and pubertal status (self‐assessment questionnaire) were measured at 1‐year intervals. Latent growth curve modeling (LGM) was used to study PF development over time. Change in fat mass had the strongest and most coherent associations with PF development during adolescence. Fat‐free mass, moderate‐to‐vigorous physical activity, and pubertal status were associated with PF development, although not systematically. Subgroup analyses showed that PF development in the low fitness group followed a similar pattern as the whole population. However, their PF remained significantly lower throughout the 2‐year period. The findings suggest that fat accumulation is an essential detrimental factor for PF development during adolescence. Actions to prevent excessive fat accumulation might help to prevent future declines in functional capacity. Indications that low fitness levels sustain during adolescence highlight the relevance of detecting these individuals and providing interventions already before adolescence. [ABSTRACT FROM AUTHOR]

In this study, we aimed at comparing Finnish primary school students' physical activity and sedentary time during outdoor-learning and traditional school days. Outdoor learning is defined as purposeful and planned learning experiences in the outdoors. The study population consisted 20 students in grades 1-6 at one primary school. Physical activity was measured objectively by hip-worn accelerometers. The amounts of physical activity and sedentary time were compared for the same students between five school days with outdoor learning and four traditional school days. The study's main findings show that, moving from traditional classroom teaching to an outdoor-learning environment decreases students' sedentary time and increases light- and moderate-intensity physical activity during the school day. No differences were observed in leisure-time physical activity on school days with or without outdoor learning. Thus, outdoor learning is an effective complement to traditional classroom teaching in promoting physically active children. [ABSTRACT FROM AUTHOR]

Background: The factors associated with preschool-aged children’s physical activity (PA) remains unclear. The aim of this cross-sectional study was to examine how different factors were associated with preschool-aged children’s objectively measured PA and sedentary time.Methods: The study population was 5–6-year-old children (n = 140) and their parents (n = 138) from the STEPS Study in Turku in Southwest Finland in 2013–2014. PA and sedentary time were measured objectively by accelerometers from children and parents and body mass index with Tanita scale. Other factors (siblings, day care, organized PA and parents’ education) were collected with questionnaires. Linear models were conducted.Results: Child’s PA was positively associated with mother’s PA and day care attendance. Child’s sedentary time was positively associated with mother’s sedentary time. Father’s PA and sedentary time were associated with respective variables in children, but only among fathers with high education.Conclusion: Parental role modelling is essential in developing child’s physically active and less sedentary lifestyle. [ABSTRACT FROM PUBLISHER]